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Post Doctorate

DISI, University of Trento, Trento

LiquidPub D3.3. Simulation and validation of the behavioral models

In many systems, objects from a given set (let it be movies in The Internet Movie Database or books on Amazon) can be rated by individual users. A similar situation occurs in Liquid Journals where readers may be allowed to rate papers and journals. A sophisticated algorithm, taking into account user ability or reputation, may produce a better aggregation of ratings than the simple arithmetic average. Various co-determination algorithms are available to this end with both user and object reputation iteratively refined together and resulting in improved measures of both derived directly from the rating data. However, none of the proposed algorithms has been studied on real data. We use various distinct real datasets to test several ranking algorithms, compare their results, and identify advantages and limits of each algorithm.

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Abstract : In many systems, objects from a given set (let it be movies in The Internet Movie Database or books on Amazon) can be rated by individual users. A similar situation occurs in Liquid Journals where readers may be allowed to rate papers and journals. A sophisticated algorithm, taking into account user ability or reputation, may produce a better aggregation of ratings than the simple arithmetic average. Various co-determination algorithms are available to this end with both user and object reputation iteratively refined together and resulting in improved measures of both derived directly from the rating data. However, none of the proposed algorithms has been studied on real data. We use various distinct real datasets to test several ranking algorithms, compare their results, and identify advantages and limits of each algorithm.

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